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A Modelling Approach: Effects Of Exuded Organic Acids And Exogenous Chelating Ligands On Bioavailability And Uptake Of Metals By Radishes (Raphanus Sativus) Grown In Hydroponics., Sergio A. Dominguez Romero
A Modelling Approach: Effects Of Exuded Organic Acids And Exogenous Chelating Ligands On Bioavailability And Uptake Of Metals By Radishes (Raphanus Sativus) Grown In Hydroponics., Sergio A. Dominguez Romero
Electronic Thesis and Dissertation Repository
Metal contamination of soil can be reduced by adding chelators to improve the efficiency of metal uptake in phytoremediation, but optimal concentrations and types of chelators have not been determined. A geochemical model (Visual MINTEQ3.1) was used to estimate the effects of four chelators on the solubility of four metals in hydroponic solution. The model showed that no iron was soluble in the absence of a chelator, while the solubilities of cadmium, copper and zinc were high with or without chelators. Despite low iron uptake in all treatments, symptoms of iron-deficiency were not visible. High concentrations of exuded organic acids …